Artigo
Vortex state in a mesoscopic flat disk with rough surface
Fecha
2012-09-01Registro en:
Physica C-superconductivity and Its Applications. Amsterdam: Elsevier B.V., v. 479, p. 49-52, 2012.
0921-4534
10.1016/j.physc.2012.01.021
WOS:000308580600010
7799253646119889
0000-0001-7041-8136
Autor
Universidade Federal de Pernambuco (UFPE)
Univ Nacl Colombia
Universidade Estadual Paulista (Unesp)
Max Planck Insitut Metallforsch
Resumen
In this paper we study some superconducting properties of a flat disk by taking into account the roughness of the surface. Also, the sample is surrounded by a thin layer of a metallic material and submitted to and external magnetic field applied perpendicular to its plane. The boundary condition is taking into account via the de Gennes extrapolation length b. We evaluate the Gibbs free energy, magnetization, vorticity, the first and second critical thermodynamical fields as a function of the external magnetic field and b parameter. We also evaluate the first critical field as a function of the surface rugosity. (C) 2012 Elsevier B. V. All rights reserved.